d0f5aa670b
Our context package predates the establishment of current best practices regarding context usage and it shows. It encourages bad practices such as using contexts to propagate non-request-scoped values like the application version and using string-typed keys for context values. Move the package internal to remove it from the API surface of distribution/v3@v3.0.0 so we are free to iterate on it without being constrained by compatibility. Signed-off-by: Cory Snider <csnider@mirantis.com>
98 lines
2.7 KiB
Go
98 lines
2.7 KiB
Go
package proxy
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import (
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"context"
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"time"
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"github.com/opencontainers/go-digest"
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"github.com/distribution/distribution/v3"
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"github.com/distribution/distribution/v3/internal/dcontext"
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"github.com/distribution/distribution/v3/registry/proxy/scheduler"
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"github.com/distribution/reference"
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)
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type proxyManifestStore struct {
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ctx context.Context
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localManifests distribution.ManifestService
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remoteManifests distribution.ManifestService
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repositoryName reference.Named
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scheduler *scheduler.TTLExpirationScheduler
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ttl *time.Duration
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authChallenger authChallenger
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}
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var _ distribution.ManifestService = &proxyManifestStore{}
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func (pms proxyManifestStore) Exists(ctx context.Context, dgst digest.Digest) (bool, error) {
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exists, err := pms.localManifests.Exists(ctx, dgst)
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if err != nil {
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return false, err
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}
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if exists {
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return true, nil
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}
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if err := pms.authChallenger.tryEstablishChallenges(ctx); err != nil {
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return false, err
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}
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return pms.remoteManifests.Exists(ctx, dgst)
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}
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func (pms proxyManifestStore) Get(ctx context.Context, dgst digest.Digest, options ...distribution.ManifestServiceOption) (distribution.Manifest, error) {
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// At this point `dgst` was either specified explicitly, or returned by the
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// tagstore with the most recent association.
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var fromRemote bool
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manifest, err := pms.localManifests.Get(ctx, dgst, options...)
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if err != nil {
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if err := pms.authChallenger.tryEstablishChallenges(ctx); err != nil {
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return nil, err
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}
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manifest, err = pms.remoteManifests.Get(ctx, dgst, options...)
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if err != nil {
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return nil, err
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}
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fromRemote = true
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}
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_, payload, err := manifest.Payload()
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if err != nil {
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return nil, err
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}
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proxyMetrics.ManifestPush(uint64(len(payload)))
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if fromRemote {
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proxyMetrics.ManifestPull(uint64(len(payload)))
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_, err = pms.localManifests.Put(ctx, manifest)
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if err != nil {
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return nil, err
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}
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// Schedule the manifest blob for removal
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repoBlob, err := reference.WithDigest(pms.repositoryName, dgst)
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if err != nil {
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dcontext.GetLogger(ctx).Errorf("Error creating reference: %s", err)
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return nil, err
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}
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if pms.scheduler != nil && pms.ttl != nil {
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pms.scheduler.AddManifest(repoBlob, *pms.ttl)
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}
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// Ensure the manifest blob is cleaned up
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// pms.scheduler.AddBlob(blobRef, repositoryTTL)
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}
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return manifest, err
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}
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func (pms proxyManifestStore) Put(ctx context.Context, manifest distribution.Manifest, options ...distribution.ManifestServiceOption) (digest.Digest, error) {
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var d digest.Digest
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return d, distribution.ErrUnsupported
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}
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func (pms proxyManifestStore) Delete(ctx context.Context, dgst digest.Digest) error {
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return distribution.ErrUnsupported
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}
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